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arXiv · 2510.07687

Elasto-plastic cell-based smoothed finite element method solving geotechnical problems

Yang Yang·Mingjiao Yan·Zongliang Zhang·Miao Zhang·Feidong Zheng·Dong Pan·Xiaozi Lin
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Abstract

This work develops an elasto-plastic cell-based smoothed finite element method (CSFEM) for geotechnical analysis. The formulation incorporates a smoothed strain field into the standard elasto-plastic framework based on the Mohr-Coulomb criterion and is implemented in ABAQUS through a user-defined element (UEL). A UEL-UMAT data-transfer strategy is introduced to enable post-processing of stress and strain in ABAQUS. The method is assessed using several benchmark problems, including three classical examples, a tunnel excavation, and a slope stability analysis. The results show that the CSFEM achieves accuracy comparable to or slightly better than the conventional FEM and matches analytical or reference solutions for the examined cases. These findings indicate that the proposed CSFEM provides a practical and robust alternative for routine elasto-plastic analyses in geotechnical engineering.

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Yang Yang, Mingjiao Yan, Zongliang Zhang, Miao Zhang, Feidong Zheng, Dong Pan, Xiaozi Lin. 2025-10-09. Elasto-plastic cell-based smoothed finite element method solving geotechnical problems. https://arxiv.org/abs/2510.07687

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